大约有 4,918 项符合查询结果(耗时:0.0215秒) [XML]

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Most efficient way to check for DBNull and then assign to a variable?

... I guess C# 6 introduction of the Elvis operator makes it easy to avoid the null reference exception in the check you suggest. value?.GetType() == typeof(DBNull) – Eniola Mar 10 '16 at 8:35 ...
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Code for decoding/encoding a modified base64 URL

...which is little different than base64 as explained in the question. Found c# code snippet in this document. JSON Web Signature ietf draft share | improve this answer | follo...
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Why doesn't Java offer operator overloading?

...o the confusion of operator overloading. As @Sebastian mentioned, Java and C# both have to deal with value and reference equality separately -- operator+ would likely deal with values and objects, but operator= is already implemented to deal with references. In C++, you should only be dealing with ...
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How to implement a ConfigurationSection with a ConfigurationElementCollection

...ay Friedman) Yield is not a feature of the .Net runtime. It is just a C# language feature which gets compiled into simple IL code by the C# compiler. (Lars Corneliussen) share | improve this...
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Routing: The current request for action […] is ambiguous between the following action methods

...move it to a different controller. Though your 2 Browse methods are valid C# overloads, the MVC action method selector can't figure out which method to invoke. It will try to match a route to the method (or vice versa), and this algoritm is not strongly-typed. You can accomplish what you want usin...
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What is a method group in C#?

...ied by the delegate type. For more information, see Variance in Delegates (C#) and Using Variance in Delegates (C#). – user2211290 Nov 24 '17 at 12:27 add a comment ...
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vs in Generics

...g derives from object. Before variance in generic interfaces was added to C# and VB.NET (in .NET 4 with VS 2010), this was a compile time error. After .NET 4, IEnumerable<T> was marked covariant, and became IEnumerable<out T>. Since IEnumerable<out T> only uses the elements with...
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Release generating .pdb files, why?

... @the In the footnote, I linked to an article explaining that "the C# compiler by design never produces the same binary twice. The C# compiler embeds a freshly generated GUID in every assembly, every time you run it, thereby ensuring that no two assemblies are ever bit-for-bit identical." Th...
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Why can't I have “public static const string S = ”stuff"; in my Class?

... From the C# language specification (PDF page 287 - or 300th page of the PDF): Even though constants are considered static members, a constant declaration neither requires nor allows a static modifier. ...
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Is functional GUI programming possible? [closed]

...ensions" (FRP Libraries; however, not FP) which was originally written for C# and then ported to Java (RxJava) and JavaScript (RxJS) and various languages. Check out reactivex.ioAt the point, Angular 2 makes extensive use of RxJS. – srph Jan 17 '16 at 16:46 ...